<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title></title>
	<style type="text/css">
		.box{
			width:100%;
			border:3px solid #000;
		}
		@media screen and (min-width:1366px){
			.box{
				height:400px;
				background:#ff0
			}
		}
		@media only screen and (max-width:1366px){
			.box{
				height:900px;
				background:#00f;
			}
		}
	</style>
</head>
<body>
	<div class="box">
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	</div>
</body>
</html>